Do you mean the starter solenoid? At least, your last pic looks like the connector plug for the starter solenoid.
Looks like you have a +2010 (I think) starter which uses that connector, you could pick up one of those from somewhere like this, or replace your starter with an earlier one which use a regular M5 ring terminal. You may or may not need to add a relay. It’s about 50/50 with LC wiring carrying enough voltage to get GM starters to crank. Interestingly we have a lot more issues with 60 series then 40 series with this on the conversions my shop has done
This Starter Connector Kit (1) connector kit includes the following genuine Original Equipment (OE) components: (1 Piece) Aptiv/Delphi Starter Connector (1 Piece) Aptiv/Delphi Metri-Pack 280 Terminal Position Assurance TPA Secondary Lock (1 Piece) Aptiv/Delphi Metri-Pack 280 Terminals for 14-12...
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